September weather forecastRaahe, Finland
September
Weather in September
September arrives as a jarring reminder of the impending winter in Raahe, Finland. Daylight averages reduce notably to 13.1 hours daily. Importantly, September sees a significant drop in sea temperatures from 16.2°C (61.2°F) down to 12.7°C (54.9°F). As evidenced by the drastic drop in sea temperatures and daylight hours, autumn proceeds to set in. With the changing hues of nature, September brings the first whispers of a forthcoming fall.Sea temperature
In Raahe, the average seawater temperature in September is 12.7°C (54.9°F).Note: Swimming in 12.7°C (54.9°F) is deemed hazardous. Exposure to temperatures below 10°C (50°F) leads to immediate severe cold shock and hyperventilation.
Daylight
The average length of the day in September in Raahe, Finland, is 13h and 3min.On the first day of the month, sunrise is at 06:04 and sunset at 20:39. On the last day of September, in Raahe, Finland, sunrise is at 07:30 and sunset at 18:53 EEST.
Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Raahe, the average seawater temperature in September is 12.7°C (54.9°F). Swimming in 12.7°C (54.9°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.
In Raahe, the average day length in September is 13h and 3min.
On the first day of September in Raahe, sunrise is at 06:04 and sunset at 20:39. On the last day of the month, sunrise is at 07:30 and sunset at 18:53 EEST.
Average sea temperature in September
Raahe, Finland
- Average sea temperature in September: 12.7°C
The best month for swimming (with the highest average sea temperature) is August (16.2°C).
The coldest month (with the lowest average sea temperature) is April (-0.4°C).
Average daylight in September
Raahe, Finland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 18min).
The month with the shortest days is December (Average daylight: 4h and 6min).
